That GIF doesn't include Oko San or Angel ;; Although I doubt you're playing Hatoful Boyfriend Plus...though if you are PLEASE UPLOAD IT MY LJ FRIENDS AND I HAVE BEEN DYING TO FIND IT AND PLAY IT.
Also I say go for Nageki's or Ryouta's ends first. ...Or Shuu's if you want to be sadistic. [Quote for major(?) spoiler >] Especially if you like Yuuya.
...Oh and there's two Bad Ends (unless you wanna count Shuu's as a BE too, then three). One of them you have to play through it once first though, and then it'll be unlocked. It also leads up to the events of the BBL ("Bad Boy Love" or something like that) path in Plus.
Anyways I'll prolly follow this like a boss and I'll try to keep any spoilers in spoiler tags or [color=transparent] tags. Or [cd=display:none;] tags. Or maybe you just won't want me to spoil anything at all XD;